package com.micai.springboot.controller.admin;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageInfo;
import com.google.common.io.ByteStreams;
import com.micai.springboot.base.BaseController;
import com.micai.springboot.dto.BlogDto;
import com.micai.springboot.service.BlogService;
import com.micai.springboot.util.MessageUtils;
import com.micai.springboot.vo.BlogVo;
import org.apache.commons.fileupload.FileItemFactory;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.multipart.MultipartHttpServletRequest;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.*;

/**
 * @Auther: zhaoxinguo
 * @Date: 2018/10/23 11:38
 * @Description: 博客管理
 */
@Controller
@RequestMapping("/admin/blog")
public class AdminBlogControllr extends BaseController {

    @Autowired
    private BlogService blogService;

    private static final ObjectMapper objectMapper = new ObjectMapper();

    @RequestMapping(value = "/list")
    public String list(@RequestParam(value="pageNum", defaultValue="1") int pageNum,
                       @RequestParam(value="pageSize", defaultValue="10") int pageSize,
                       Model model) {
        Page<BlogDto> blogDtos = blogService.getBlogByPage(pageNum, pageSize);
        PageInfo<BlogDto> page = new PageInfo<BlogDto>(blogDtos);
        model.addAttribute("page",page);
        return "admin/blog/blogList";
    }

    @PostMapping(value = "/save")
    @ResponseBody
    public Map<String, Object> save(@ModelAttribute BlogVo blogVo) {
        Map<String, Object> retMap = MessageUtils.success();
        try {
            BlogDto blogDto = new BlogDto();
            BeanUtils.copyProperties(blogVo, blogDto);
            blogDto.setCreator(getId());
            blogDto.setModifier(getId());
            if (blogService.save(blogDto) == 1) {
                retMap = MessageUtils.success("保存成功");
                return retMap;
            }
        } catch (Exception e) {
            retMap = MessageUtils.error();
        }
        return retMap;
    }

    @GetMapping(value = "/get/{id}")
    @ResponseBody
    public Map<String, Object> get(@PathVariable("id") Long id) {
        Map<String, Object> retMap = MessageUtils.success();
        try {
            BlogDto blogDto = blogService.getBlogById(id);
            if (blogDto != null) {
                retMap.put("blogDto", blogDto);
                return retMap;
            }
        } catch (Exception e) {
            retMap = MessageUtils.error();
        }
        return retMap;
    }

    @PostMapping(value = "/edit")
    @ResponseBody
    public Map<String, Object> edit(@ModelAttribute BlogVo blogVo) {
        Map<String, Object> retMap = null;
        try {
            BlogDto blogDto = blogService.getBlogById(blogVo.getId());
            if (blogDto == null) {
                retMap = MessageUtils.error("修改失败");
                return retMap;
            }
            BeanUtils.copyProperties(blogVo, blogDto);
            blogDto.setModifier(getId());
            if (blogService.update(blogDto) == 1) {
                retMap = MessageUtils.success("修改成功");
                return retMap;
            }
        } catch (Exception e) {
            retMap = MessageUtils.error("修改失败");
        }
        return retMap;
    }

    @PostMapping(value = "/deleteBatch")
    @ResponseBody
    public Map<String, Object> deleteBatch(@RequestParam("ids[]") List<Long> ids) {
        Map<String, Object> retMap = null;
        try {
            ids.forEach(id -> blogService.deleteById(id));
            retMap = MessageUtils.success("删除成功");
            return retMap;
        } catch (Exception e) {
            retMap = MessageUtils.error();
        }
        return retMap;
    }

    /**
     * 文件上传
     * @param request
     * @param response
     * @return
     */
    @PostMapping(value = "/upload")
    @ResponseBody
    public Map<String, Object> upload(HttpServletRequest request, HttpServletResponse response) {
        try {
            // 文件保存目录路径
            String savePath = "D://imgSavePath/";
            String saveUrl = request.getContextPath() + "/imgSavePath/";
            // 文件保存目录URL
            // 定义允许上传的文件扩展名
            HashMap<String, String> extMap = new HashMap<>();
            extMap.put("image", "gif,jpg,jpeg,png,bmp");
            extMap.put("flash", "swf,flv");
            extMap.put("media", "swf,flv,mp3,wav,wma,wmv,mid,avi,mpg,asf,rm,rmvb");
            extMap.put("file", "doc,docx,xls,xlsx,ppt,htm,html,txt,zip,rar,gz,bz2");
            // 最大文件大小
            long maxSize = 1000000;
            response.setContentType("text/html; charset=UTF-8");
            if(!ServletFileUpload.isMultipartContent(request)){
                return getError("上传文件失败。");
            }
            // 检查目录
            File uploadDir = new File(savePath);
            if(!uploadDir.isDirectory()){
                return getError("上传目录不存在。");
            }
            // 检查目录写权限
            if(!uploadDir.canWrite()){
                return getError("上传目录没有写权限。");
            }
            String dirName = request.getParameter("dir");
            if (dirName == null) {
                dirName = "image";
            }
            if(!extMap.containsKey(dirName)){
                return getError("目录名不正确。");
            }
            // 创建文件夹
            savePath += dirName + "/";
            saveUrl += dirName + "/";
            File saveDirFile = new File(savePath);
            if (!saveDirFile.exists()) {
                saveDirFile.mkdirs();
            }
            SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd");
            String ymd = sdf.format(new Date());
            savePath += ymd + "/";
            saveUrl += ymd + "/";
            File dirFile = new File(savePath);
            if (!dirFile.exists()) {
                dirFile.mkdirs();
            }
            FileItemFactory factory = new DiskFileItemFactory();
            ServletFileUpload upload = new ServletFileUpload(factory);
            upload.setHeaderEncoding("UTF-8");
            MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request;
            Iterator itr = multipartRequest.getFileNames();
            while (itr.hasNext()) {
                String fileName = (String) itr.next();
                MultipartFile file = multipartRequest.getFile(fileName);
                // 检查文件大小
                if(file.getSize() > maxSize){
                    return getError("上传文件大小超过限制。");
                }
                // 检查扩展名
                /*String fileExt = fileName.substring(fileName.lastIndexOf(".") + 1).toLowerCase();*/
                String fileExt = file.getOriginalFilename().substring(file.getOriginalFilename().lastIndexOf(".") + 1).toLowerCase();
                if(!Arrays.asList(extMap.get(dirName).split(",")).contains(fileExt)){
                    return getError("上传文件扩展名是不允许的扩展名。只允许" + extMap.get(dirName) + "格式。");
                }
                // 重新生成文件名
                SimpleDateFormat df = new SimpleDateFormat("yyyyMMddHHmmss");
                String newFileName = df.format(new Date()) + "_" + new Random().nextInt(1000) + "." + fileExt;

                File uploadedFile = new File(savePath, newFileName);
                ByteStreams.copy(file.getInputStream(), new FileOutputStream(uploadedFile));

                // 返回上传成功的文件路径
                Map<String, Object> msg = new HashMap<String, Object>();
                msg.put("error", 0);
                msg.put("url", saveUrl + newFileName);
                return msg;
            }
        } catch (Exception e) {
            e.printStackTrace();
            return getError("上传文件失败。");
        }
        return null;
    }

    /**
     * 文件空间
     * @param request
     * @param response
     */
    @RequestMapping(value = "/fileManager")
    @ResponseBody
    public void fileManager(HttpServletRequest request, HttpServletResponse response) {
        try {
            ServletOutputStream out = response.getOutputStream();
            // 根目录路径，可以指定绝对路径，比如 /var/www/attached/
            /*String rootPath = application.getRealPath("/") + "images/";*/
            String rootPath = "D://imgSavePath/";
            // 根目录URL，可以指定绝对路径，比如 http://www.yoursite.com/attached/
            /*String rootUrl = request.getContextPath() + "/images/";*/
            String rootUrl = request.getContextPath() + "/imgSavePath/";
            // 图片扩展名
            String[] fileTypes = new String[] { "gif", "jpg", "jpeg", "png", "bmp" };
            String dirName = request.getParameter("dir");
            if (dirName != null) {
                if (!Arrays.<String> asList(new String[] { "image", "flash", "media", "file" }).contains(dirName)) {
                    out.println("Invalid Directory name.");
                    return;
                }
                rootPath += dirName + "/";
                rootUrl += dirName + "/";
                File saveDirFile = new File(rootPath);
                if (!saveDirFile.exists()) {
                    saveDirFile.mkdirs();
                }
            }
            // 根据path参数，设置各路径和URL
            String path = request.getParameter("path") != null ? request.getParameter("path") : "";
            String currentPath = rootPath + path;
            String currentUrl = rootUrl + path;
            String currentDirPath = path;
            String moveupDirPath = "";
            if (!"".equals(path)) {
                String str = currentDirPath.substring(0, currentDirPath.length() - 1);
                moveupDirPath = str.lastIndexOf("/") >= 0 ? str.substring(0, str.lastIndexOf("/") + 1) : "";
            }
            // 排序形式，name or size or type
            String order = request.getParameter("order") != null ? request.getParameter("order").toLowerCase() : "name";
            // 不允许使用..移动到上一级目录
            if (path.indexOf("..") >= 0) {
                out.println("Access is not allowed.");
                return;
            }
            // 最后一个字符不是/
            if (!"".equals(path) && !path.endsWith("/")) {
                out.println("Parameter is not valid.");
                return;
            }
            // 目录不存在或不是目录
            File currentPathFile = new File(currentPath);
            if (!currentPathFile.isDirectory()) {
                out.println("Directory does not exist.");
                return;
            }
            // 遍历目录取的文件信息
            List<Hashtable> fileList = new ArrayList<Hashtable>();
            if (currentPathFile.listFiles() != null) {
                for (File file : currentPathFile.listFiles()) {
                    Hashtable<String, Object> hash = new Hashtable<String, Object>();
                    String fileName = file.getName();
                    if (file.isDirectory()) {
                        hash.put("is_dir", true);
                        hash.put("has_file", (file.listFiles() != null));
                        hash.put("filesize", 0L);
                        hash.put("is_photo", false);
                        hash.put("filetype", "");
                    } else if (file.isFile()) {
                        String fileExt = fileName.substring(fileName.lastIndexOf(".") + 1).toLowerCase();
                        hash.put("is_dir", false);
                        hash.put("has_file", false);
                        hash.put("filesize", file.length());
                        hash.put("is_photo", Arrays.<String> asList(fileTypes).contains(fileExt));
                        hash.put("filetype", fileExt);
                    }
                    hash.put("filename", fileName);
                    hash.put("datetime", new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(file.lastModified()));
                    fileList.add(hash);
                }
            }

            if ("size".equals(order)) {
                Collections.sort(fileList, new SizeComparator());
            } else if ("type".equals(order)) {
                Collections.sort(fileList, new TypeComparator());
            } else {
                Collections.sort(fileList, new NameComparator());
            }
            Map<String, Object> msg = new HashMap<String, Object>();
            msg.put("moveup_dir_path", moveupDirPath);
            msg.put("current_dir_path", currentDirPath);
            msg.put("current_url", currentUrl);
            msg.put("total_count", fileList.size());
            msg.put("file_list", fileList);
            response.setContentType("application/json; charset=UTF-8");
            String msgStr = objectMapper.writeValueAsString(msg);
            out.println(msgStr);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    private Map<String, Object> getError(String message) {
         Map<String, Object> msg = new HashMap<String, Object>();
         msg.put("error", 1);
         msg.put("message", message);
         return msg;
    }

    class NameComparator implements Comparator {
        public int compare(Object a, Object b) {
            Hashtable hashA = (Hashtable) a;
            Hashtable hashB = (Hashtable) b;
            if (((Boolean) hashA.get("is_dir"))
                    && !((Boolean) hashB.get("is_dir"))) {
                return -1;
            } else if (!((Boolean) hashA.get("is_dir"))
                    && ((Boolean) hashB.get("is_dir"))) {
                return 1;
            } else {
                return ((String) hashA.get("filename"))
                        .compareTo((String) hashB.get("filename"));
            }
        }
    }

    class SizeComparator implements Comparator {
        public int compare(Object a, Object b) {
            Hashtable hashA = (Hashtable) a;
            Hashtable hashB = (Hashtable) b;
            if (((Boolean) hashA.get("is_dir"))
                    && !((Boolean) hashB.get("is_dir"))) {
                return -1;
            } else if (!((Boolean) hashA.get("is_dir"))
                    && ((Boolean) hashB.get("is_dir"))) {
                return 1;
            } else {
                if (((Long) hashA.get("filesize")) > ((Long) hashB
                        .get("filesize"))) {
                    return 1;
                } else if (((Long) hashA.get("filesize")) < ((Long) hashB
                        .get("filesize"))) {
                    return -1;
                } else {
                    return 0;
                }
            }
        }
    }

    class TypeComparator implements Comparator {
        public int compare(Object a, Object b) {
            Hashtable hashA = (Hashtable) a;
            Hashtable hashB = (Hashtable) b;
            if (((Boolean) hashA.get("is_dir"))
                    && !((Boolean) hashB.get("is_dir"))) {
                return -1;
            } else if (!((Boolean) hashA.get("is_dir"))
                    && ((Boolean) hashB.get("is_dir"))) {
                return 1;
            } else {
                return ((String) hashA.get("filetype"))
                        .compareTo((String) hashB.get("filetype"));
            }
        }
    }
}
